I replaced one of those on my truck last year. About $100 in parts.
I remember in high school — a ‘few’ years ago — we used to play rally car driver out on the gravel roads passing through “hill and dale” wheat field land around here. Never mind we didn’t know exactly what “rally car driver” meant, but we faked it anyway. There were lots of dips and rises, some you could get air over (we called it ‘flying’). Well, you can guess where this is going — I got some big air — bottomed the suspension — and the gas tank predictably got ground into the gravel. This was a ‘67 Chev Impala powered by 396 - 325 HP as it was generously measured then. The tank must have had a pretty respectable gauge of steel as there was only one small puncture. Trailing a small stream of leaded gasoline we made it back home — about 20 miles — just as the needle hit “E”. We fixed the hole with a screw and didn’t tell our parents. The screw held for the life of the car (with us anyway, should have kept it). The car salesman wanted to sell my dad the 427 version but it is a good thing we didn’t have access to that.